If a number of circles touch a given line segment PQ at a point A, then their centers lie on the perpendicular bisector of PQ.
False
Let the S1, S2, S3, …., Sn be n circles with centers C1, C2, C3, …, Cn respectively.
And The PQ is a common tangent to all the circles at point A which is common to all circles.
As we know,
tangent at any point on the circle is perpendicular to the radius through point of contact
we have,
C1A ⏊ PQ
C2A ⏊ PQ
C3A ⏊ PQ
CnA ⏊ PQ
So, C1 C2 C3 … Cn all lie on the perpendicular line to PQ but not on perpendicular bisector as
PA may or may not be equal to AQ .